hahah even though i like the live and learn theme song i refuse to fight to that as well. im pretty sure the stage will be from green hill with that music remixed and as other options for music boss theme from 1,2 and emerald coast from sonic Adventure 1. (i made this prediction 1st)

Maybe Robotnik can pop out somewhere in his floating chair and aim stuff at you or something. XD

And I love Live&Learn. << Hangin' on the edge of tomorrow~*shot*
I guess it's not exactly the feel players will want though. I'm sure they'll work something out for music. Pretty much -everything- seems to have been redone. <3